BF the answer is quite simple. I stumbled upon it this morning as I was hurling empty soup containers at migrant workers huddling together for warmth at a bus stop ( It's cheaper and more fun than recycling). You see, liberalism is a fraud. It has no substance. It has no intelligence. It has no reason. Liberalism is based on deception of self and deception of others. It is a corrupt and dishonest philosophy predicated on immaturity, selfishness, revenge and brainwashing. Liberalism abhors hard work, family, individuality, morality and equality. It is only concerned with overthrowing the "social order" and the redress of injustices from generations ago. It despises prosperity and only pretends to care about the middle class because America is largely comprised of the middle class. It hates self sufficiency and freedom because deep down all liberals know in their hearts that given the opportunity, nobody in America except the dirt poor leeches with no brains or ambition and the easily indoctrinated youth would ever, in a million years subscribe to their backwards, insane and ultimately anti American agenda. To that end, liberals kill themselves with baseless accusations (racism etc.) and frivolous attempts to censor all voices of dissent.
When you come to grips with the fact that liberalism is a con job, not a political ideology, understanding the leftist mindset becomes laughable. It is predictable, repetitive and pathetically transparent.